A comparator has the following values: RL = 20 kΩ, VS = +10 V, and Vref = +2 V applied to the inverting input). If the noninverting input goes to +3 V, the output voltage
A) will be approximately +9 V.
B) will be approximately -9 V.
C) will be approximately +3 V.
D) cannot be determined without knowing the value of ACL for the circuit.

Question

Quizplus · Accepted Answer

When the noninverting input voltage (+3 V) is higher than the inverting input voltage (Vref = +2 V), the output of the comparator will go towards the positive supply voltage (VS = +10 V). However, due to the limitations of the comparator's output stage, it typically cannot reach the full supply voltage, so the output will be slightly less, approximately +9 V.

A Comparator Has the Following Values: RL = 20 KΩ